E2E testing of Cyberknife lung tracking using a homemade lung phantom

Xiao Wei; Xiangjie MA; Mingsheng LI; Zhengzhao Zhang; Ya Liu; Yuze Yang; Jinsheng Cheng

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E2E testing of Cyberknife lung tracking using a homemade lung phantom

VernacularTitle:自制肺部模体用于射波刀肺追踪 E2E 验证分析
Author: Xiao WEI ; Xiangjie MA ; Mingsheng LI ; Zhengzhao ZHANG ; Ya LIU ; Yuze YANG ; Jinsheng CHENG
Publication Type:Journal Article
Keywords: Cyberknife; Quality control; Lung dynamic phantom; Lung tracking
From: Chinese Journal of Radiological Health 2024;33(1):1-6
CountryChina
Language:Chinese
Abstract: Objective　:To verify the feasibility of using a homemade lung phantom for quality control of Cyberknife by comparing the measurement results of the homemade lung phantom and CIRS dynamic phantom in E2E testing of Cyberknife lung tracking.
Methods　 :The patient treatment process was simulated, including CT positioning, plan design, irra- diation implementation, film scanning, and analysis using the homemade phantom and CIRS phantom. The two phantoms were measured five times using MLC under the S7 generation Cyberknife and five times using Iris under the M6 generation Cyberknife. The differences in measurement results between the two phantoms were analyzed using independent sample t-test.
Results　:For the S7 generation Cyberknife, the statistical analysis of differences between the two phantoms in the detection values on the X-axis, Y-axis, Z-axis, and total deviation showed P values of 0.236, 0.175, 0.289, and 0.668, respect- ively. For the M6 generation Cyberknife, the statistical analysis showed P values of 0.880, 0.891, 0.573, and 0.433, respect- ively. The P values were all > 0.05. Therefore, there were no statistically significant differences in the detection results between the homemade lung phantom and the CIRS phantom under the S7 and M6 generation Cyberknife. The total deviation values were <1.5 mm.
Conclusion　 :The homemade lung phantom and CIRS phantom have consistent measurement results in the E2E testing of Cyberknife lung tracking and meet the requirements of Report of AAPM TG-135 and WS 667- 2019 standard. Therefore, the homemade lung phantom is feasible for clinical quality control of Cyberknife.